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Finding the Fourth Proportional to 404,649.78, 607,153.73 and 212,479.00

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Solution

The fourth proportional to 404,649.78, 607,153.73 and 212,479.00 is: 318,812.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,649.78 : 607,153.73 = 212,479.00 : x
  2. Step 2: Convert to fraction form
    404,649.78/607,153.73 = 212,479.00/x
  3. Step 3: Cross multiply
    404,649.78x = 607,153.73 × 212,479.00
  4. Step 4: Simplify right side
    404,649.78x = 129,007,414,816.39
  5. Step 5: Solve for x
    x = 129,007,414,816.39/404,649.78
  6. Step 6: Final answer
    x = 318,812.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.